7.2.3.9 IfcSensor

Capteur
Sensor

A sensor is a device that measures a physical quantity and converts it into a signal which can be read by an observer or by an instrument.

HISTORY  New entity in IFC4

Connection Use Definition

The IfcSensor may be connected to other objects as follows using the indicated relationship:


Common Use Definitions

The following concepts are inherited at supertypes:

 Instance diagram

Object Typing

The Object Typing concept applies to this entity as shown in Table 277.
Type
IfcSensorType
IfcDistributionControlElementType
IfcDistributionElementType

Table 277 — IfcSensor Object Typing



Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 278.
PredefinedTypeName
 Pset_SensorPHistory
 Pset_SensorTypeCommon
CONDUCTANCESENSORPset_SensorTypeConductanceSensor
CONTACTSENSORPset_SensorTypeContactSensor
FIRESENSORPset_SensorTypeFireSensor
FLOWSENSORPset_SensorTypeFlowSensor
GASSENSORPset_SensorTypeGasSensor
HEATSENSORPset_SensorTypeHeatSensor
HUMIDITYSENSORPset_SensorTypeHumiditySensor
IONCONCENTRATIONSENSORPset_SensorTypeIonConcentrationSensor
LEVELSENSORPset_SensorTypeLevelSensor
LIGHTSENSORPset_SensorTypeLightSensor
MOISTURESENSORPset_SensorTypeMoistureSensor
MOVEMENTSENSORPset_SensorTypeMovementSensor
PHSENSORPset_SensorTypePHSensor
PRESSURESENSORPset_SensorTypePressureSensor
RADIATIONSENSORPset_SensorTypeRadiationSensor
RADIOACTIVITYSENSORPset_SensorTypeRadioactivitySensor
SMOKESENSORPset_SensorTypeSmokeSensor
SOUNDSENSORPset_SensorTypeSoundSensor
TEMPERATURESENSORPset_SensorTypeTemperatureSensor
WINDSENSORPset_SensorTypeWindSensor
CO2SENSORPset_SensorTypeCO2Sensor
FROSTSENSORPset_SensorTypeFrostSensor
IDENTIFIERSENSORPset_SensorTypeIdentifierSensor
 Pset_ElectricalDeviceCommon
 Pset_Condition
 Pset_EnvironmentalImpactIndicators
 Pset_EnvironmentalImpactValues
 Pset_ManufacturerOccurrence
 Pset_ManufacturerTypeInformation
 Pset_PackingInstructions
 Pset_ServiceLife
 Pset_Warranty

Table 278 — IfcSensor Property Sets for Objects



Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 279.
Name
Qto_SensorBaseQuantities

Table 279 — IfcSensor Quantity Sets



Material Constituents

The Material Constituents concept applies to this entity as shown in Table 280.
NameDescription
CasingMaterial from which the casing is constructed.

Table 280 — IfcSensor Material Constituents



Port Nesting

The Port Nesting concept applies to this entity as shown in Table 281.
PredefinedTypeNameFlowTypeDescription
 OutputSOURCESIGNALTransmits signal.

Table 281 — IfcSensor Port Nesting



Control Flow

The Control Flow concept applies to this entity as shown in Table 282.
TypeDescription
IfcDistributionFlowElementSensors may be connected to a flow element for which an aspect of the fluid or flow is measured.

Table 282 — IfcSensor Control Flow




XSD Specification:

 <xs:element name="IfcSensor" type="ifc:IfcSensor" substitutionGroup="ifc:IfcDistributionControlElement" nillable="true"/>
 <xs:complexType name="IfcSensor">
  <xs:complexContent>
   <xs:extension base="ifc:IfcDistributionControlElement">
    <xs:attribute name="PredefinedType" type="ifc:IfcSensorTypeEnum" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

ENTITY IfcSensor
SUBTYPE OF IfcDistributionControlElement;
PredefinedType : OPTIONAL IfcSensorTypeEnum;
WHERE
CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcSensorTypeEnum.USERDEFINED) OR ((PredefinedType = IfcSensorTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFCBUILDINGCONTROLSDOMAIN.IFCSENSORTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

Formal Propositions:

CorrectPredefinedType : Either the PredefinedType attribute is unset (e.g. because an IfcSensorType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.
CorrectTypeAssigned : Either there is no sensor type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcSensorType.

Inheritance Graph:

ENTITY IfcSensor
ENTITY IfcRoot
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcObjectDefinition
INVERSE
HasAssignments : SET OF IfcRelAssigns FOR RelatedObjects;
Nests : SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy : SET OF IfcRelNests FOR RelatingObject;
HasContext : SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy : SET OF IfcRelAggregates FOR RelatingObject;
Decomposes : SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations : SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcObject
ObjectType : OPTIONAL IfcLabel;
INVERSE
IsDeclaredBy : SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects;
Declares : SET OF IfcRelDefinesByObject FOR RelatingObject;
IsTypedBy : SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy : SET OF IfcRelDefinesByProperties FOR RelatedObjects;
ENTITY IfcProduct
ObjectPlacement : OPTIONAL IfcObjectPlacement;
Representation : OPTIONAL IfcProductRepresentation;
INVERSE
ReferencedBy : SET OF IfcRelAssignsToProduct FOR RelatingProduct;
ENTITY IfcElement
Tag : OPTIONAL IfcIdentifier;
INVERSE
FillsVoids : SET [0:1] OF IfcRelFillsElement FOR RelatedBuildingElement;
ConnectedTo : SET OF IfcRelConnectsElements FOR RelatingElement;
IsInterferedByElements : SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements : SET OF IfcRelInterferesElements FOR RelatingElement;
HasProjections : SET OF IfcRelProjectsElement FOR RelatingElement;
ReferencedInStructures : SET OF IfcRelReferencedInSpatialStructure FOR RelatedElements;
HasOpenings : SET OF IfcRelVoidsElement FOR RelatingBuildingElement;
IsConnectionRealization : SET OF IfcRelConnectsWithRealizingElements FOR RealizingElements;
ProvidesBoundaries : SET OF IfcRelSpaceBoundary FOR RelatedBuildingElement;
ConnectedFrom : SET OF IfcRelConnectsElements FOR RelatedElement;
ContainedInStructure : SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;
ENTITY IfcDistributionElement
INVERSE
HasPorts : SET OF IfcRelConnectsPortToElement FOR RelatedElement;
ENTITY IfcDistributionControlElement
INVERSE
AssignedToFlowElement : SET [0:1] OF IfcRelFlowControlElements FOR RelatedControlElements;
ENTITY IfcSensor
PredefinedType : OPTIONAL IfcSensorTypeEnum;
END_ENTITY;

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