OPTICAL RADAR EQUIPMENT FOR VEHICLE

• Main Authors: TANAKA YASUSHI, FUJIKI NORIO, SATOU HIROSHI
• Format: Patent
• Language: English
• Published: 19.12.1985
• Edition: 4
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

PURPOSE:To improve the reliability of a titled device by cutting off an electrification of a primary side coil, when a current value flowing to the primary side coil of a transformer connected to a secondary side coil has reached a prescribed value. CONSTITUTION:When a voltage E of a battery is supplied, an output of a comparator 55 becomes ''1'', a transistor Tr11 becomes an on-state, a current flowing through a primary winding 15 of a transformer 13 and the Tr11 from the voltage E flows to a resistance 31, and a both end voltage Vr of this resistance 31 rises. This voltage Vr is charged to a capacitor 67 through a diode 57, and also supplied as a voltage Vr' to an inversion input terminal of the comparator 55. This voltage Vr' rises in the same way as the voltage Vr, and when it reaches a high threshold voltage of the comparator 55, an output of the comparator 55 is inverted and becomes ''0'', and the Tr11 becomes off. As a result, a current which has flowed through the primary winding 15 of the transformer 13 is cut off, therefore, a high voltage is generated in a secondary winding 17 of the transformer 13, charged to a capacitor 21 through a diode 19 and always goes to the same voltage.