Inclination sensors

Sensors formobile applicationsInclination sensorsSystem descriptionInclination sensorsIn automation sensors are the “nerves” of the control system. Sensors arealso used in mobile machines and installations. In contrast to the units forindustrial automation, however, sensors for mobile applications have tomeet considerably higher demands. As they are mounted in exposed positionsthey have to meet special requirements. The protection rating and themechanical resistance are important features. The electrical requirementscan be compared to those of the controllers, I/O modules and dialoguemodules – due to their compact design they are a challenge as regards thecircuit development.Sensors are generally differentiated between units with a built-in CANopeninterface and sensors with binary or analogue output stages which are connecteddirectly to controllers or I/O modules.Inclination sensors with a built-in interfaceThe 2-axis inclination sensor with CANopen interface enables levelling andangular position detection of mobile machines.Typical applications are for example angle detection of access platforms,levelling of mobile cranes or the set-up of mobile machines working onuneven ground.This is a group of sensors of which the analogue measured value is evaluated,standardised and converted into a CANopen message in the sensorelectronics. The structure of the transmitted data is defined via a CANopenprofile, like for the I/O modules. Under the profile number 410, inclinometer,all important parameters and the transmission of the user data are defined.analoguevaluesPrinciple of inclinationsensorswith a built-inCANopen interface.microprocessormeasuredvaluesinterfaceparameterdataThe measuring cells function according to the conductometric principle. Thechange of conductivity of a liquid is evaluated. Depending on the sensorinclination the electrodes in the liquid are exposed to different degrees ofwetness.This leads to characteristics comparable to that of a potentiometer. Arrangingthe electrodes crosswise results in the signed values for the twoaxes. The inclination sensor CR2102 additionally has two analogue outputs.For this unit the measured values are additionally indicated as current values4...20 mA.mounting surfaceAngle of inclinationdependingon the sensoraxis of CR2101.+15% Y –15% +15% X –15%transverse inclinationlongitudinal inclinationVisit our website: www.ifm.com102