Title:
ON-VEHICLE ULTRASONIC DETECTOR
Document Type and Number:
Japanese Patent JP3140863
Kind Code:
B2
Abstract:
PURPOSE: To execute the processing from the operation to detect the abnormal condition and obstacles to the returning to the normal operation in a rapid and sure manner, and prevent the malfunction of an equipment due to the wind noise or the like when the power is turned on while a vehicle is traveling in executing the processing of the transmitted and received waves after the lapse of a specified time period after the power is turned on.
CONSTITUTION: An output transmission signal from a control part 1 is amplified by a transmission signal amplifier 2, the signal is applied to a microphone 4 through a reverberation absorbing circuit 3, and the sound wave converted in the mechanical signal is emitted in the air. When the generation of an abnormal condition and the existence of an obstacle are detected, the sound wave is reflected, and again converted into the electrical signal by the microphone 4. The electric signal is amplified by a received signal amplifier 5, and received by the control part 1 through a wave pattern shaping circuit 6. When a detector switch is turned on, the power source stabilized by a power source circuit 7 is made, inputted to the control part 1, and the operation of the detector is started.
Inventors:
Hajime Sasaki
Naoya Higashi
Naoya Higashi
Application Number:
JP28823192A
Publication Date:
March 05, 2001
Filing Date:
October 27, 1992
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS,LTD.
International Classes:
G01S7/52; G01S15/10; G01S15/93; (IPC1-7): G01S15/10; G01S7/52; G01S15/93
Domestic Patent References:
| JP3238383A | ||||
| JP6151584A | ||||
| JP4250389A | ||||
| JP4250387A | ||||
| JP63158483A | ||||
| JP1101488A | ||||
| JP63437A |
Attorney, Agent or Firm:
Keisei Nishikawa (1 person outside)