Abstract: A vehicle turn angle detecting device calculates an average value .DELTA..phi. of steering wheel rotation angle at every unit time together with a travelled distance .DELTA.L. And this device calculates a vehicle turn angle .DELTA..theta. at every unit time by using the equation shown below. By adding the calculated turn angles .DELTA..theta., the vehicle running direction to the standard direction can be detected..DELTA..phi.=K.multidot.tan.DELTA..phi..multidot..DELTA.

Abstract: An antiskid control device including a main line system for usual braking operation, a subline system for an antiskid control, and an oil hydraulic mechanism supplying pressurized oil to the subline system. The oil hydraulic mechanism has an oil hydraulic source constantly generating hydraulic pressure during operation of the engine of the vehicle, an oil hydraulic motor driven by the oil hydraulic source, and an oil hydraulic pump discharging a highly pressurized oil. While the oil hydraulic motor is constantly rotated during the operation of the engine, the oil hydraulic pump is rotated when the rotation of the oil hydraulic motor is transmitted thereto. For this purpose, a mechanism for transmitting the rotation between the motor and the pump is provided.

Abstract: An apparatus for detecting a rotation of, for example, an automotive steering wheel has comprises a rotary plate fixed to a shaft and rotatable in accordance with a rotation of the steering wheel, an electric circuit for detecting a rotation of the rotary plate; a rotary member rotatable in accordance with a rotation of the shaft; a first opening for detecting a reference position signal provided in the rotary plate, a second opening for detecting a reference position signal provided in the rotary member, a reduction gear mechanism for reducing the rotational speed of the rotary member such as to allow the first and second signal detecting openings to be aligned with each other once in a plurality of rotations of the shaft, and photo electro transducers for detecting a reference position disposed in a line passing through the first and second signal detecting openings.

Abstract: A sensing apparatus including: a first electrode member; a second electrode member arranged at opposing positions a predetermined distance away and electrically isolated from the first electrode member; and an electric circuit connected to the first and second electrode members. The first and the second electrode members are operatively connected by an impedance formed between the first and the second electrode members in response to existence of a substance to be sensed between the first and the second electrode members. The electric circuit outputs a signal in response to the impedance. The sensing apparatus is applicable for detecting, for example, the level of a liquid in a vessel.

Abstract: A static discharge device for preventing an electrostatic shock comprising a conductive body to be grounded to the ground body, a resistance element contacting with the conductive body and having a resistance value to restrict a current value when the conductive body is contact with the ground body by the person, and an insulating material provided between the conductive body and the contacting portion held by the person so as to elongate a creeping distance between the conductive body and the human body.

Abstract: A device for indicating information on the return route for an automotive vehicle includes a memory and control portion for successively storing the detected direction signals and the detected distance signals on the route to a destination and successively generating indication signals to the extent of a predetermined distance in the forward direction on the return route on the basis of the stored detected direction signals and the distance signals. The device also includes a circuit for correcting the difference between the distance of the vehicle travel on the route to the destination and the return route, so that the correct indication of information of the return route is displayed on a display device such as a CRT.

Abstract: A device and method for detecting the running direction of an automotive vehicle includes terrestrial magnetic field direction detection, vehicle steering angle detection, and response to the signals of these detectors for producing the vehicle running direction signal. In a computer, or equivalent circuitry, occurrence of abnormalities of the terrestrial magnetic field is decided when the relationship between the change in the vehicle running direction and the change in the steering angle does not satisfy a predetermined requirement.

Abstract: A heading detecting apparatus of the type which is installed in a roof of a vehicle including a magnetic member (a steel body) capable of having a remanence and includes a heading sensor positioned near the magnetic member, whereby the apparatus detects the terrestrial magnetism and thereby detects the forward heading of the moving objects the apparatus includes a permeability member positioned between the magnetic member and the heading sensor so as to reduce the effect of the remanence of the magnetic member on the detection of the terrestrial magnetism by the heading sensor.

Abstract: A vehicle speed control method comprises the steps of dividing a frequency corresponding with the actual speed by a frequency divisional ratio determined inversely proportional to a desired speed, producing a timing signal with the divided frequency, calculating a time difference between a predetermined time period corresponding with a desired speed and the total of constant time periods defined by a time period of the timing signal, calculating a time difference between both the totals of constant time periods defined by respective time periods of the preceding and following timing signals, and producing a correction signal related to the calculated time differences such that an output signal is produced to actuate a control element so as to control the quantity of fuel supplied into an engine.

Abstract: A heading detecting apparatus is attached to a moving object and includes a geomagnetic field sensor for detecting the direction of the earth's magnetic field in terms of orthogonal first and second signals and a computing circuit responsive to orthogonal first and second electric signals from the geomagnetic field sensor. In the computing circuit, when any one of the orthogonal first and second electric signals from the geomagnetic field sensor is a predetermined value, the value of the other electric signal is detected so that in accordance with the detected value an offset value is computed and stored, and the electric signals from the geomagnetic field sensor is corrected in accordance with the offset values.

Abstract: A magnetic field measuring apparatus including a magnetic sensor having an excitation winding and orthogonal first and second output windings for generating a first and a second output signal indicative of the orthogonal components of an external magnetic field, adjusting circuits for adjusting the amplitude and frequency of the sensor output signals, circuits responsive to common timing signals whereby the outputs of the adjusting circuit are subjected to sample-and-hold operation and A/D conversion and the resulting converted outputs are counted to generate count outputs, and a first and a second display unit for simultaneously displaying the count outputs.

Abstract: A vehicle's heading indicating apparatus includes a direction-finding sensor having a pair of external field sensing windings wound perpendicular to each other, a sensor exciting oscillator circuit, a signal sampling timing circuit, sample-and-hold circuits, comparators, a logic circuit and an indicator circuit. The output of each of the sensor windings is divided into predetermined (N+1) signal levels such that the heading or direction of travel of a vehicle is detected and indicated in accordance with the combination of each two signal levels sensing the heading, and also large disturbance of the earth's magnetic field is sensed such that the just preceding direction of travel obtained is indicated when the earth's magnetic field is excessively low or high.

Abstract: In a speed control system for automotive vehicles, a first time difference between values of a timing signal responsive to the actual speed of the vehicle and a command signal indicative of a desired speed is calculated to produce a first differential signal indicative of an absolute value of the first time difference, and a second time difference between respective values of the preceding and following timing signals is calculated to produce a second differential signal indicative of an absolute value of the second time difference and a sign signal indicative of one of positive and negative signs of the second time difference.

Abstract: An apparatus for generating a parallel magnetic field by passing current through a coil cylindrically wound and shielded against the external magnetic fields by a magnetically shielded housing incorporating a fine meshed material such as a high magnetic permeability amorphous alloy. Inside the housing, there are provided a non-magnetic bobbin, on which the coil is wound, and a power source for providing current to the coil to produce a parallel magnetic field of an intensity corresponding to that of the current to be generated within the bobbin.

Abstract: An overdrive control apparatus is provided with a gradient sensor unit for sensing a gradient of a vehicle running road. The overdrive control apparatus releases an overdrive mode of an automatic change gear device which is set up for a level drive of the vehicle in accordance with a sensing signal from the gradient sensing unit.

Abstract: A vehicle speed control method comprises the steps of calculating a time difference between a predetermined period of time corresponding with a desired speed and the actual period of time corresponding with the actual vehicle speed, calculating a time difference between the respective actual periods of time, detecting each value of the calculated time differences in its low resolution related to a predetermined low speed range when the actual period of time represents a value in the predetermined low speed range, detecting each value of the calculated time differences in its high resolution related to a predetermined high speed range when the actual period of time represents a value in the predetermined high speed range, and producing a correction signal related to one of the detected values such that an output signal is produced to actuate a control element so as to control the quantity of fuel supplied into a combustion engine.

Abstract: An automobile running position indicator apparatus which comprises a device for generating a unit coverage distance signal each time the automobile has covered a unit distance, a device for generating a direction signal representing the automobile running direction at each time and a device for generating set signals representing the distance and direction from the starting point to the destination. A vectorical length from the starting point to the destination is operated from the set signals. The distance covered by the automobile is accumulated for each direction from the distance signal and the direction signal thereby to calculate a vectorial value length from the starting point to the present position. These vectorial values are used to determine a vectorial length from the present position to the destination, and the resulting vectorial direction and distance are displayed in the same display section.

Abstract: The remote control switch apparatus has an instruction switch provided on a steering wheel to project toward the inside of a passenger compartment away from an instrument panel of the car so as to indicate a driving condition. A transmitter is installed at the steering wheel to generate a radio wave signal or radiation signal in response to the instruction switch and a receiver, provided on the instrument panel, receives the radiation signal and generates a control signal.

Abstract: In a direction indicator including a direction sensor having an excitation coil wound on a core and two output coils wound thereon to cross at the right angles with each other, a direct current of given amount is supplied to the two output coils and a direct current magnetic field is produced so that the maximum values of the output signals is made equal by adjusting the gain of the output signals.

Abstract: A demagnetizer for removing residual magnetism in vehicles includes a single coil which is adapted to surround a portion or the whole of the body of a vehicle. A direct current and alternating current are supplied to the single coil simultaneously to produce a d.c. magnetic field and an a.c. magnetic field. The direction and magnitude of the d.c. magnetic field are so arranged, that the d.c. magnetic field cancels the external magnetic field. The magnitude of the a.c. magnetic field is varied within a predetermined range periodically to remove the residual magnetism.