Object Detection using Ultrasound

Reliability for Every Application

Object detection is one of the areas in which the ultrasonic sensor clearly demonstrates its advantages. In contrast to visual methods, factors such as colour or transparency do not affect the measurement results. And that’s without mentioning the fact that X-ray equipment leads people and the environment to unwanted exposure to radiation.

Objekterkennung durch Ultraschallsensoren

    Example of Use: Counting of Objects

    In the industries of packaging and logistics, counting objects is one of the most common activities. Ultrasonic sensors means the work can be performed reliably and quickly. The retro-reflective sensor operating mode is most ideally suited to this, regardless of whether the object to be detected is positioned in such a way as to be sound-absorbing or repelling. This is made possible by the installation of a reference reflector.

    Ideally, this is a plate made of a material such as plastic or metal, which offers an extremely smooth surface. The use of other ore-existing backgrounds such as walls, floors or conveyor belts is also an alternative.

    If an object now passes through the retro-reflective sensor, it triggers a deviation in the ultrasound signal between the sensor and the reference reflector, and a switching process is triggered. The evaluation function in the sensor counts the sensor signals, so that an entirely reliable piece number can be determined.

    Example of Use: Detecting Objects

    Reflective barrier systems at car park entrances and exits can also be controlled by ultrasonic sensors. In addition to counting vehicles, the safety aspect plays a role here, because the barrier should not lower if the vehicle is still below. The sensors installed detect the moving object regardless of the model type or colour and check the entire space under the barrier. Only once this area is free again does the bar lower, based on a switching signal.

    It is quick and easy to install sensors in the housing. However, if there are multiple barriers in close proximity, this should be taken into account. In this case, the sensors are synchronised so that they do not interfere with each other. Installation must also ensure that the sound beam does not touch the ground. This is particularly important as seasons change during the course of the year, given temperature fluctuations, as the sound beams are greater at low temperatures. However, calibration to change the parameters can be applied in the software if necessary.

    application

    elobau Ultrasonic Sensors

    Precise, flexible, reliable

    The principle of ultrasonic technology is as simple as it is effective. High-frequency ultrasonic sound waves are emitted by the sensor, which are then reflected by the target object, and detected again by the sensor.

    Find the product that suits your needs in our product selector.

    ultraschallsensoren
    Products
    elobau Ultraschallsensor U18s

    Ultrasonic Sensor U*18

    distance measurementobject detection

    ​Thanks to the compact and robust design, the U*18S is the optimum solution for difficult application conditions. In combination with various output forms, the space-saving version offers flexibility for measuring and switching applications. In addition, this series can be used either as a diffuse reflection sensor or as a retro-reflective sensor.

    elobau Ultraschallsensor U18

    Ultrasonic Sensor U*18S

    distance measurement

    Ultrasonic sensors of the U*18 series offer maximum functionality and precision, even under demanding conditions, including in potentially explosive environments. Two different housing materials, an operating range of up to 2.2 metres, four operating modes and various output forms leave no application unsolved. Simple configuration, either via teach-in button or IO-Link, also ensures high system availability. Synchronisation as well as multiplex mode ensures high process reliability even when operating multiple sensors simultaneously.

    elobau Ultraschallsensor U30

    Ultrasonic Sensor U*30

    level measurementdistance measurementobject detectionposition detection

    Thanks to high-performance electronics, the U*30 series is the ideal partner for wide-range detection of objects and filling heights of distances of up to 8 metres. Like all cylindrical designs from elobau, the sensors are temperature compensated to achieve high accuracy even in the case of temperature fluctuations. Available in stainless steel and plastic versions, the versatility of this sensor allows it to be used for a wide range of application requirements.

    elobau Ultraschallsensor Uda18

    Ultrasonic Sensor UDA18 ATEX

    ​UDA18 ATEX ultrasonic sensors have the same functions and features as the sensors of the U*18 series. They were, however, developed especially for use in areas potentially subject to gas or dust explosion. Their ATEX approval makes them suitable for use in the chemical and pharmaceutical industries as well as in systems that process oil and gas.

    U*18U*18SU*30UDA18 ATEX
    measurement range

    100…900 mm
    200…2200 mm

    40…300 mm
    80…1200 mm

    250…3500 mm
    350…6000 mm*
    600…8000 mm*

    100…900 mm
    200…2200 mm

    ​operating modes

    retro-reflective sensor
    diffuse reflection sensor

    retro-reflective sensor
    diffuse reflection sensor

    retro-reflective sensor
    diffuse reflection sensor

    ​diffuse reflection sensor

    ​outputs

    Push-Pull / IO-Link
    NPN / PNP
    4…20 mA
    0…10 V

    Push-Pull / IO-Link
    NPN / PNP
    4…20 mA
    ​0…10 V

    Push-Pull / IO-Link
    NPN / PNP
    4…20 mA
    0…10 V

    NPN / PNP
    4…20 mA
    0…10 V

    ​operating voltage

    10…30V DC

    10…30V DC

    10…30V DC

    10…30V DC

    adjustment option

    ​teach-in button
    IO-Link

    ​programming cable
    ​IO-Link

    ​teach-in ​button
    IO-Link

    ​teach-in button

    ​operating temperature

    -20…+70 °C

    -20…+70 °C

    -20…+70 °C

    -20…+50 °C

    ​housing material

    DIN 1.4404
    ​or PBT

    DIN 1.4404
    ​or PBT

    DIN 1.4404
    ​or PBT

    DIN 1.4404
    ​or PBT

    ​dimensions

    M18x1
    L = 91,6 mm

    M18x1
    ​L = 60,3 mm

    ​M30x1,5
    L = 98,9mm

    M18x1
    L = 91,6 mm

    ​connection type

    ​M12 5-pin connector

    M12 4-pin connector

    ​M12 5-pin connector

    M12 5-pin connector

    protection class

    IP 67

    IP 67

    IP 67

    IP 67

    ​approvals

    CE
    cULus

    CE
    cULus

    CE
    cULus

    CE
    cULus
    ATEX

    ATEX

    gas (EX) version:
    II 3G Ex nA IIC T6 Gc (zone 2)​

    dust (EX) version:
    II 3D Ex tc IIIB T60°C Dc (zone 22)​

    IO-​Link

    ​yes

    ​yes

    yes

    ​synchronisation

    ​yes

    yes

    yes

    ​multiplex operation

    ​yes

    yes

    yes

    ​temperature compensation

    ​yes

    ​yes

    yes

    yes

    downloads

    EU declaration of conformity
    (.pdf // 105 kb)

    UL approval
    (.pdf // 72 kb)

    IODD Software
    (.zip // 9,4 mb)

    IODD
    (.zip // 160 kb)

    operating manual
    (.zip // 2,54 mb)

    EU declaration of conformity
    (.pdf // 105 kb)

    UL approval
    (.pdf // 72 kb)

    IODD Software
    (.zip // 9,4 mb)

    IODD
    (.zip // 101 kb)

    operating manual
    (.zip// 1,36 mb)

    EU declaration of conformity
    (.pdf // 105 kb)

    UL approval
    (.pdf // 72 kb)

    IODD Software
    (.zip // 9,4 mb)

    IODD
    (.zip // 287 kb)

    operating manual
    (.zip // 3,32 mb)

    EU declaration of conformity
    (.pdf // 80 kb)

    UL approval
    (.pdf // 72 kb)

    operating manual
    (.zip // 1,0 mb)

    Installation and safety instructions
    (.pdf // 398 kB)

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    elobau codeOperating modeRangeHousingMaterialDigital outputAnalogue outputIO-LinkATEXSYNCMUX 
    UD18SP1P030Diffuse reflection40-300mmM18 shortPBT plastic1x PNP-nonononoRequest product
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    UD18P2N220SDiffuse reflection200-2.200mmM18PBT plastic2x NPN-nonoyesyesRequest product
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    UD18PCP220SDiffuse reflection200-2.200mmM18PBT plastic1x PNP4-20mAnonoyesyesRequest product
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    UR18P2P220SRetro-reflective300-2.200mmM18PBT plastic2x PNP-nonoyesyesRequest product
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    UC30PIC350SDiffuse reflection / Retro-reflection250-3.500mmM30PBT plasticPush-Pull4-20mAyesnoyesnoRequest product
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    UDA18MVN220SDiffuse reflection200-2.200mmM18Stainless steel1x NPN0-10VnoyesyesyesRequest product
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