ES2075915T3 - Sistema ultrasonico para medida de distancias. - Google Patents

Sistema ultrasonico para medida de distancias.

Info

Publication number
ES2075915T3
ES2075915T3 ES91108554T ES91108554T ES2075915T3 ES 2075915 T3 ES2075915 T3 ES 2075915T3 ES 91108554 T ES91108554 T ES 91108554T ES 91108554 T ES91108554 T ES 91108554T ES 2075915 T3 ES2075915 T3 ES 2075915T3
Authority
ES
Spain
Prior art keywords
eco
value
amplitude
periods
distance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
ES91108554T
Other languages
English (en)
Inventor
James J Phelan
Jeffrey C Hawkinson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deere and Co
Original Assignee
Deere and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Deere and Co filed Critical Deere and Co
Application granted granted Critical
Publication of ES2075915T3 publication Critical patent/ES2075915T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
    • A01B63/02—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors
    • A01B63/10—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means
    • A01B63/111—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means regulating working depth of implements
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
    • A01B63/02—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors
    • A01B63/10—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means
    • A01B63/111—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means regulating working depth of implements
    • A01B63/1112—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means regulating working depth of implements using a non-tactile ground distance measurement, e.g. using reflection of waves
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
    • A01B63/02—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors
    • A01B63/10—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means
    • A01B63/111—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means regulating working depth of implements
    • A01B63/114—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means regulating working depth of implements to achieve a constant working depth
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06—Systems determining the position data of a target
    • G01S15/08—Systems for measuring distance only
    • G01S15/10—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/523—Details of pulse systems
    • G01S7/526—Receivers
    • G01S7/527—Extracting wanted echo signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/539—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section

Landscapes

  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

UN SISTEMA SENSOR DE LA DISTANCIA (10) INCLUYE UN TRANSDUCTOR ULTRASONICO (XM1), UN TRANSRECEPTOR (12) Y UNA UNIDAD DE PROCESO DE SEÑAL BASADA EN UN MICROCONTROLADOR (14). EL TRANSDUCTOR (12) GENERA PERIODICAMENTE Y DIRIGE HACIA EL TERRENO UNA SEÑAL ULTRASONICA DE FRECUENCIA DUAL. SEÑALES DE ECO DESDE EL SUELO Y/O CUALQUIER CULTIVO U HOJARASCA QUE INTERVENGA SON REFLEJADOS EN EL TRANSDUCTOR (12) Y PROCESADOS. EL SISTEMA GENERA SEÑALES DE ENVOLTURA DE ECO AMPLIFICADAS Y FILTRADAS. LOS PERIODOS DE MARGEN DE CABEZA Y RASTREO SON DETERMINADOS COMO LOS PERIODOS QUE LAS SEÑALES DE ECO CRUZAN UN VALOR DE HUMBRAL QUE ES UNA CIERTA PARTE DE UN VALOR DE AMPLITUD DE ECO MAXIMO. SE DERIVA UN VALOR DE DISTANCIA CERCANA DEL PERIODO DE MARGEN EN CABEZA DEL PRIMER ECO QUE EXCEDE UNA AMPLITUD MINIMA. SE DETERMINA UN VALOR DE DISTANCIA LEJANA COMO EL PERIODO DE MARGEN DE RASTREO DE LA ULTIMA SEÑAL DE ECO QUE TIENE UNA AMPLITUD QUE EXCEDE UN CIERTO VALOR. LOS PERIODOS DE ECO MULTIPLES Y LOS VALORES DE AMPLITUD SON DERIVADOS DESDE EL ECO DE MAXIMA AMPLITUD. ESTOS VALORES SON UTILIZADOS PARA PREVENIR ECOS QUE OCURREN DESPUES DE LOS PERIODOS DE ECO MULTIPLES CON MENOS DE UNA CIERTA AMPLITUD, DE SER UTILIZADOS EN LA DETERMINACION DEL VALOR DE LA DISTANCIA MAS LEJANA. ESTE VALOR DE DISTANCIA MAS LEJANA REPRESENTA LA DISTANCIA AL SUELO Y ECOS TEMPRANOS DEBILITADOS DE HOJARASCA Y CULTIVOS, LOS ECOS MULTIPLES SE PUEDEN IGNORAR.
ES91108554T 1990-05-29 1991-05-27 Sistema ultrasonico para medida de distancias. Expired - Lifetime ES2075915T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/529,828 US5060205A (en) 1990-05-29 1990-05-29 Ultrasonic distance measuring system

Publications (1)

Publication Number Publication Date
ES2075915T3 true ES2075915T3 (es) 1995-10-16

Family

ID=24111407

Family Applications (3)

Application Number Title Priority Date Filing Date
ES91108554T Expired - Lifetime ES2075915T3 (es) 1990-05-29 1991-05-27 Sistema ultrasonico para medida de distancias.
ES95102041T Expired - Lifetime ES2137384T3 (es) 1990-05-29 1991-05-27 Sistema de medir distancias.
ES95102042T Expired - Lifetime ES2145170T3 (es) 1990-05-29 1991-05-27 Metodo para medir una distancia.

Family Applications After (2)

Application Number Title Priority Date Filing Date
ES95102041T Expired - Lifetime ES2137384T3 (es) 1990-05-29 1991-05-27 Sistema de medir distancias.
ES95102042T Expired - Lifetime ES2145170T3 (es) 1990-05-29 1991-05-27 Metodo para medir una distancia.

Country Status (7)

Country Link
US (1) US5060205A (es)
EP (3) EP0653644B1 (es)
JP (1) JP2966964B2 (es)
CA (1) CA2041174C (es)
DE (3) DE69131669T2 (es)
DK (3) DK0653645T3 (es)
ES (3) ES2075915T3 (es)

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Also Published As

Publication number Publication date
EP0653644A2 (en) 1995-05-17
DE69132170T2 (de) 2000-09-28
EP0653645A3 (en) 1995-06-14
JP2966964B2 (ja) 1999-10-25
EP0653645A2 (en) 1995-05-17
CA2041174C (en) 1997-10-07
DE69112273T2 (de) 1996-02-01
EP0459336B1 (en) 1995-08-23
DE69131669D1 (de) 1999-11-04
EP0459336A1 (en) 1991-12-04
EP0653645B1 (en) 2000-05-03
DE69132170D1 (de) 2000-06-08
DK0653644T3 (da) 2000-04-10
EP0653644A3 (en) 1995-06-14
CA2041174A1 (en) 1991-11-30
EP0653644B1 (en) 1999-09-29
DK0459336T3 (da) 1995-11-27
DK0653645T3 (da) 2000-09-18
US5060205A (en) 1991-10-22
ES2137384T3 (es) 1999-12-16
ES2145170T3 (es) 2000-07-01
JPH0627236A (ja) 1994-02-04
DE69112273D1 (de) 1995-09-28
DE69131669T2 (de) 2000-04-06

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