exported
equivalent
load cell
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Loadcell
Generated on 2026-04-15
Natural Language Definition
EN
A load cell is an instrument that converts mechanical force (tension, compression, pressure, or torque) into a proportional electrical signal for measurement purposes.
PT-BR
Uma célula de carga é um instrumento que converte força mecânica (tração, compressão, pressão ou torque) em um sinal elétrico proporcional para fins de medição.
Formal Axioms
Semi-formal (Aristotelian)
Every load cell is an instrument that bears a force-to-electrical transduction function and has a force-receiving element, transduction element, and electrical output.
First-Order Logic Theory
Loading…
▸ Stored override
∀x (LoadCell(x) ↔ Instrument(x) ∧ ∃f(ForceToElectricalTransductionFunction(f) ∧ bearerOf(x,f)))
OWL 2 / Turtle
@prefix copi: <https://www.inf.ufrgs.br/ontologies/copi/> .
@prefix : <https://www.inf.ufrgs.br/ontologies/copi/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix bfo: <http://purl.obolibrary.org/obo/> .
@prefix iof-core: <https://spec.industrialontologies.org/ontology/construct/> .
@prefix iof-av: <https://spec.industrialontologies.org/ontology/annotation/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix qudt: <http://qudt.org/schema/qudt/> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix apv: <http://inf.ufrgs.br/ontologies/apv#> .
### COPI — Core Ontology for Petroleum Installations
### Class module: LoadCell
<https://www.inf.ufrgs.br/ontologies/copi>
rdf:type owl:Ontology ;
dcterms:title "Core Ontology for Petroleum Installations (COPI)"@en ;
dcterms:title "Ontologia Core para Instalações de Petróleo (COPI)"@pt-br ;
dcterms:description "BFO/IOF-Core conformant ontology of equipment classes for petroleum production plants, developed using the five-step RDL enrichment method."@en ;
skos:scopeNote "Material artifacts (bfo:material_entity) that (i) are part of a petroleum production plant, and (ii) bear at least one function whose realization involves the transport (e.g. production and injection), processing (separation and other processes), control, monitoring, measurement, containment or offloading of material or energy."@en ;
skos:scopeNote "Artefatos materiais (bfo:material_entity) que (i) fazem parte de uma planta de produção de petróleo, e (ii) possuem ao menos uma função cuja realização envolve o transporte (p. ex. produção e injeção), processamento (separação e outros processos), controle, monitoramento, medição, contenção ou escoamento de material ou energia."@pt-br ;
skos:scopeNote "COPI provides high-level equipment categories defined by function to demonstrate the defined-class mechanism. Equipment subtypes are annotated with references to CFIHOS and PCA RDL terms. COPI is not a reference data library; organizations should use CFIHOS, PCA RDL, or ISO 14224 for comprehensive equipment classification."@en ;
skos:scopeNote "COPI fornece categorias de alto nível de equipamentos definidas por função para demonstrar o mecanismo de classe definida. Os subtipos de equipamentos são anotados com referências aos termos do CFIHOS e do PCA RDL. COPI não é uma biblioteca de dados de referência; organizações devem utilizar o CFIHOS, o PCA RDL ou a ISO 14224 para classificação abrangente de equipamentos."@pt-br ;
owl:versionInfo "1.1.0" ;
owl:imports <https://spec.industrialontologies.org/ontology/core/Core/> ;
owl:imports <http://purl.obolibrary.org/obo/bfo/2020/bfo.owl> ;
dcterms:creator "Nicolau Oyhenard dos Santos"@en ;
dcterms:contributor "Cauã Antunes" ;
dcterms:contributor "Haroldo Rojas" ;
dcterms:contributor "Rafael Petry" ;
dcterms:contributor "Régis Romeu" ;
dcterms:contributor "Mara Abel" ;
dcterms:isPartOf <https://inf.ufrgs.br/projetos/OntoKG> ;
dcterms:publisher "Universidade Federal do Rio Grande do Sul (UFRGS)"@en ;
dcterms:license <https://creativecommons.org/licenses/by/4.0/> ;
dcterms:created "2026-04-08"^^xsd:date ;
dcterms:modified "2026-10-08"^^xsd:date ;
apv:GlobalMinLanguageCoverage "en pt-br" ;
apv:ClassURIFormationRule "https://www[.]inf[.]ufrgs[.]br/ontologies/copi/(COPI_[0-9]{7}|[A-Z][A-Za-z0-9]*)" ;
apv:ClassMinAnnotationCoverage "rdfs:label https://spec.industrialontologies.org/ontology/annotation/naturalLanguageDefinition" .
iof-av:naturalLanguageDefinition rdf:type owl:AnnotationProperty ;
apv:MinAnnotationLength 20 .
### Identity-giving function
:COPI_0000539 rdf:type owl:Class ; # ForceToElectricalTransductionFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000540 # ForceToElectricalTransductionProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000540 # ForceToElectricalTransductionProcess
] ;
rdfs:label "force to electrical transduction function"@en ;
rdfs:label "função de transdução força-elétrica"@pt-br .
### Process type
:COPI_0000540 rdf:type owl:Class ; # ForceToElectricalTransductionProcess
rdfs:subClassOf iof-core:MeasurementProcess ;
rdfs:label "force to electrical transduction process"@en ;
rdfs:label "processo de transdução força-elétrica"@pt-br .
iof-core:MeasurementProcess rdf:type owl:Class .
:COPI_0000540 # ForceToElectricalTransductionProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom iof-core:InformationContentEntity
] .
### Equipment universal: LoadCell
:COPI_0000310 rdf:type owl:Class ; # LoadCell
owl:equivalentClass [
rdf:type owl:Class ;
owl:intersectionOf (
:COPI_0000091 # Instrument
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000539 # ForceToElectricalTransductionFunction
]
)
] ;
rdfs:label "load cell"@en ;
rdfs:label "célula de carga"@pt-br ;
iof-av:naturalLanguageDefinition "A load cell is an instrument that converts mechanical force (tension, compression, pressure, or torque) into a proportional electrical signal for measurement purposes."@en ;
skos:definition "A load cell is an instrument that converts mechanical force (tension, compression, pressure, or torque) into a proportional electrical signal for measurement purposes."@en ;
iof-av:naturalLanguageDefinition "Uma célula de carga é um instrumento que converte força mecânica (tração, compressão, pressão ou torque) em um sinal elétrico proporcional para fins de medição."@pt-br ;
rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000196 ; owl:someValuesFrom :COPI_0000384 ] ;
skos:definition "[ISO 15926-4] A <LOAD CELL> is an <ARTEFACT> and a <FORCE MEASURING ELEMENT> and a <TRANSDUCER> that converts a force such as tension, compression, pressure, or torque into an electrical signal that can be measured"@en ;
skos:definition "[CFIHOS] A transducer which produces a signal with a defined relationship to the force applied to it."@en ;
skos:definition "[SLB Glossary] The sensor component in a weight-indicator system that detects the tensional or compressional forces being imparted to the running string at surface."@en ;
skos:definition "[OnePetro] A device based on strain gauge technology that helps measure the surface weight of coiled tubing."@en .
# Disjointness: LoadCell and FlowTransmitter
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000310 :COPI_0000118 ) . # LoadCell, FlowTransmitter
# Disjointness: LoadCell and TemperatureTransmitter
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000310 :COPI_0000155 ) . # LoadCell, TemperatureTransmitter
# Disjointness: LoadCell and LevelTransmitter
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000310 :COPI_0000131 ) . # LoadCell, LevelTransmitter
Axiomatization Decision Log
1
Identity-Giving Function
Function class
ForceToElectricalTransductionFunction
⊑ DesignedFunction
Realized in
ForceToElectricalTransductionProcess
⊑ MeasurementProcess
All definitions consistently identify force-to-electrical signal conversion as the identity-giving function. This distinguishes load cells from other force measuring devices that may use purely mechanical indication or other output modalities.
2
Genus Determination
Instrument
Load cell is consistently described as a measuring/detecting device across all sources. While 'transducer' appears in definitions, it's more of a functional descriptor than a structural classification. The numerous subtypes (strain gauge, piezoelectric, hydraulic variants) indicate internal complexity warranting Assembly classification under the Instrument genus, which best captures its measurement equipment nature.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
These parts represent the minimum necessary components for force-to-electrical transduction functionality. Specific implementations vary (strain gauge vs. piezoelectric vs. hydraulic) but these functional elements are universal.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
—
Outputs (O)
InformationContentEntity
— proportional to applied force
Transformation (T)
mechanical force converted to electrical signal through transduction
Load cells have a single force input and single electrical signal output with a defined proportional relationship, distinguishing them from other measurement transducers.
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
Disjointness Axioms
flow transmitter
temperature transmitter
level transmitter
C?: flow transmitter [kind_ambiguous]. C?: temperature transmitter [kind_ambiguous]. C?: level transmitter [kind_ambiguous]. Load cells measure mechanical force while these other transmitters measure different physical quantities (flow rate, temperature, fluid level), making their measurement functions incompatible.
Cross-Standard Observations
ISO 15926 provides the most comprehensive definition including multiple force types. SLB Glossary focuses on drilling applications (surface weight measurement). OnePetro specifically mentions strain gauge technology. CFIHOS provides the most general transducer definition. All sources consistently identify the force-to-signal conversion function.
