Road void search radar system

• US 5,227,799 A
• Filed: 03/09/1992
• Issued: 07/13/1993
• Est. Priority Date: 03/09/1992
• Status: Expired due to Fees

• Current Assignee: Ministry of Construction - Kinki Regional Construction Bureau, Mitsui Engineering & Shipbuilding Company Limited (Mitsui E&S Holdings Co., Ltd.)
• Original Assignee: Mitsui Engineering & Shipbuilding Company Limited (Mitsui E&S Holdings Co., Ltd.)
• Inventors: Murasawa, Kanji, Konishi, Masuo, Kimura, Noriaki
• Primary Examiner(s): TUBBESING, THEODORE
• Application Number:
  US07/848,108
• Time in Patent Office: 491 Days
• Field of Search: 342/22, 342/27, 342/70, 342/117
• US Class Current: 342/22
• CPC Class Codes: G01S 13/0209 Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband
• CPC Class Codes: G01S 13/22 using irregular pulse repetition frequency G01S13/12 takes precedence
• CPC Class Codes: G01S 13/885 for ground probing prospecting or detecting using electromagnetic waves G01V3/12
• CPC Class Codes: G01V 3/12 operating with electromagnetic waves operating with millimetre waves G01V8/005
• CPC Class Codes: G01V 3/15 specially adapted for use during transport, e.g. by a person, vehicle or boat

Abstract

A road void search radar system includes a rotary encoder, a radar controller, an analyzer, and a recording unit. The rotary encoder generates a pulse signal having a period corresponding to a predetermined distance interval traveled by a vehicle. The radar controller outputs a wave every time the pulse signal is supplied from the rotary encoder. The analyzer analyzes an underground state by processing the output signal received from the radar controller. The recording unit records digital data signals and analyzes results.

Claims

1. A road void search radar system comprising:

a rotary encoder for generating a pulse signal having a period corresponding to a predetermined distance interval traveled by a vehicle;

a radar controller for transmitting a wave as an output signal every time the pulse signal is supplied from said rotary encoder;

an analyzer for analyzing an underground state by processing the output signal received from said radar controller; and

a recording unit for recording digital data signals and analyzing the result.

2. A system according to claim 1, wherein said radar controller further comprises means for setting the period of time during which the wave is transmitted to be shorter than the period of the pulse signal.