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1. WO2020112017 - FORCE SENSOR, AGRICULTURAL IMPLEMENT COMPRISING SUCH FORCE SENSOR, METHOD OF OPERATING SUCH AGRICULTURAL IMPLEMENT, METHOD OF MEASURING FORCE AND METHOD OF MANUFACTURING A FORCE SENSOR

Publication Number WO/2020/112017
Publication Date 04.06.2020
International Application No. PCT/SE2019/051211
International Filing Date 29.11.2019
IPC
A01C 7/20 2006.01
AHUMAN NECESSITIES
01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
CPLANTING; SOWING; FERTILISING
7Sowing
20Parts of seeders for conducting and depositing seed
G01L 1/22 2006.01
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
1Measuring force or stress, in general
20by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
22using resistance strain gauges
G01L 1/26 2006.01
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
1Measuring force or stress, in general
26Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload
CPC
A01C 7/205
AHUMAN NECESSITIES
01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
CPLANTING; SOWING; FERTILISING
7Sowing
20Parts of seeders for conducting and depositing seed
201Mounting of the seeding tools
205comprising pressure regulation means
G01L 1/2243
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
1Measuring force or stress, in general
20by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids
22using resistance strain gauges
2206Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
2243the supports being parallelogram-shaped
G01L 1/26
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
1Measuring force or stress, in general
26Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload
Applicants
  • VÄDERSTAD HOLDING AB [SE]/[SE]
Inventors
  • COLLIN, Morgan
Agents
  • AWA SWEDEN AB
Priority Data
1851499-230.11.2018SE
1951046-016.09.2019SE
Publication Language English (EN)
Filing Language Swedish (SV)
Designated States
Title
(EN) FORCE SENSOR, AGRICULTURAL IMPLEMENT COMPRISING SUCH FORCE SENSOR, METHOD OF OPERATING SUCH AGRICULTURAL IMPLEMENT, METHOD OF MEASURING FORCE AND METHOD OF MANUFACTURING A FORCE SENSOR
(FR) CAPTEUR DE FORCE, OUTIL AGRICOLE COMPRENANT UN TEL CAPTEUR DE FORCE, PROCÉDÉ DE FONCTIONNEMENT D'UN TEL OUTIL AGRICOLE, PROCÉDÉ DE MESURE DE FORCE ET PROCÉDÉ DE FABRICATION D'UN CAPTEUR DE FORCE
Abstract
(EN)
This document discloses a force sensor, comprising a first attachment (304a), a second attachment (304b), a material bridge (305) extending between the attachments, and at least one force sensor (310a, 310b) arranged on the material bridge (305). The force sensor comprises a force limiter (306), comprising at least a pair of contact surfaces (3063a, 3063b; 3065a, 3065b), formed to be separated from each other as long as a maximum load is not exceeded and to contact each other when said maximum load is reached. The material bridge and the force limiter are arranged relative to each other so that a bending moment of the material bridge brings the contact surfaces toward each other. The document also discloses an agricultural implement, comprising such a force sensor, a method of measuring force and a method of manufacturing the force sensor.
(FR)
La présente invention concerne un capteur de force, comprenant une première attache (304a), une deuxième attache (304b), un pont de matière (305) s'étendant entre les attaches, et au moins un capteur de force (310a, 310b) disposé sur le pont de matière (305). Le capteur de force comprend un limiteur de force (306), comprenant au moins une paire de surfaces de contact (3063a, 3063b ; 3065a, 3065b), formées pour être séparées les unes des autres tant qu'une charge maximale n'est pas dépassée et pour entrer en contact les unes avec les autres lorsque ladite charge maximale est atteinte. Le pont de matière et le limiteur de force sont disposés l'un par rapport à l'autre de telle sorte qu'un moment de flexion du pont de matière amène les surfaces de contact l'une vers l'autre. L'invention concerne également un outil agricole, comprenant un tel capteur de force, un procédé de mesure de force et un procédé de fabrication du capteur de force.
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