选择右接近传感器

接近传感器,also called detectors,allow you to detect an object in the vicinity without having to touch it.以下类型的技术主要用于检测对象的存在或不存在:

  • Inductive
  • Capacitive
  • 磁性
  • Ultrasound
  • Photoelectric

View proximity sensors

  • 如何选择一个接近传感器?

    选择近距离传感器时,请问自己提出以下问题是有帮助的:

    • 待检测物体的性质是什么:固体,液体,颗粒状,金属等?
    • 传感器和对象之间的距离是多少?
    • What is the shape of the object to be detected?
    技术 Inductive Capacitive 磁性 Ultrasound Photoelectric
    范围 <80 mm <60毫米 <100 mm <15毫米 < 200毫米
    成本 €30-€200 €100-€200 €20-€120 200 -€€1,000 €60-€300
    Detected Materials 金属零件 All materials 磁性parts Any material, in any form (solid, liquid, etc.) Parts with reflective properties
  • 为什么选择电感接近传感器?

    气泡电感近距离传感器
    气泡电感近距离传感器

    Inductive proximity sensorshave the largest sales volumes. They include an oscillating circuit that generates an electromagnetic field. Any metal part that approaches it is detected because it becomes the seat of induced currents and then reduces oscillations, which the detector notices.

    The main characteristics of inductive sensors are:

    • 能够only be used for金属零件
    • 相对有限的范围: up to 80 mm, varying depending on the nature of the alloy
    • Low cost: half the price of a photoelectric detector
    • 坚固耐用harsh environments, not sensitive to impact, vibrations, dust, etc.
    • 相对switchingfrequency(several kHz), which enables parts passing at a high speed to be checked, even in rotation.
    • Contains no moving parts subject to wear

    WHAT CAN IT BE USED FOR?

    Inductive sensors are found in machine tools, machines for the textile industry, the automotive industry, assembly lines, etc. They are used for the detection of metal parts in harsh environments and when it is necessary to check parts that move quickly.

  • 为什么选择电容式接近传感器?

    Pepperl+Fuchs capacitive proximity sensors
    Pepperl+Fuchs capacitive proximity sensors

    Theoperatingprinciple of电容式接近传感器类似于电感传感器。电磁场由位于传感器的主侧的电容器产生。附近的零件改变了振荡的强度和频率。与电感传感器不同,电容传感器不仅可以检测金属部件,而且是各种形状和材料的部分(固体,液体,粘性,粉状等)。

    电容式传感器的主要特性是:

    • Low range: < 60 mm
    • Slightly more expensive than inductive sensors
    • 用过的forall types of parts由所有不同的材料制成
    • 能够detect对象through non-metallic walls
    • Sensitive to moisture和dense vapors
    • 用过的广泛的水平检测(即通过塑料小瓶)和在短程内检测透明材料
    • 没有机械磨损,long service life independent of use
    • 适应工业环境(polluting atmosphere)
    • High throughput

    WHAT CAN IT BE USED FOR?

    Capacitive sensors are found on packaging lines, packaging installations and when filling levels are measured through plastic or glass walls.

  • Why choose a magnetic proximity sensor?

    BERNSTEIN magnetic proximity sensor
    BERNSTEIN magnetic proximity sensor

    又称霍尔效应传感器,该传感器的原理工作与电感传感器类似的原则。磁性proximity sensorsadditionally incorporate a glass and metal blade that magnetizes very quickly when it is in the presence of a magnet and demagnetizes just as quickly when there is no magnet present. Magnetic detectors thus have a large range, given their relatively small dimensions. The part to be detected must contain a magnet or be magnetized.

    The main characteristics of magnetic sensors are:

    • Use for parts that are magnetized or contain a magnet
    • Low cost
    • Enables detection through non-ferromagnetic walls
    • Not sensitive to vibrations and dirt
    • 没有磨损
    • Galvanic isolation between the object measured and the circuit can be considered.
  • 为什么选择超声波接近传感器?

    microsonic ultrasonic proximity sensors
    microsonic ultrasonic proximity sensors

    The operating principle ofultrasonic proximity sensorsis based on the emission and reception of high-frequency ultrasonic waves (around 200 kHz). The return of the wave makes it possible to detect the presence of a part and measure its distance from the sensor (by measuring the time the wave takes to come back). Ultrasonic sensors can use transmitted or reflected ultrasonic waves.

    超声传感器的主要特点是:

    • 检测所有类型的部件(powder, metal, solid, liquid, translucent glass, plastic, cardboard, wood, etc.)
    • 范围几米(15 m)
    • 对环境的敏感性很小
    • 响应时间有限通过空气中的声音传播速度
    • 成本相对较高(€200-€1,000).
    • Sensitive to draftstemperature(-10°C至50°C)
    • 能够’t detect sound absorbing materials (cotton wool, foam, etc.)

    WHAT CAN IT BE USED FOR?

    这种类型的传感器专为非常具体的应用而设计:恶劣环境中的长距离检测,透明或高反射物体等检测。
    For example, ultrasonic sensors can be found on conveyors to detect bottles or packaging. They can also be used to detect the level of a liquid (in vials) or pellets (in hoppers).

  • 为什么选择光电接近传感器?

    病态光电接近传感器
    病态光电接近传感器

    This kind of detector has a significant market share. It is based on an optical principle. It detects the object when the light beam is either reduced or interrupted by the object passing through it. Depending on the object passing through the light beam and the detection distance, different configurations are possible:

    • 通过梁:发射器和接收器是分开的。
    • 逆向反射:发出的光被反射器反射回来
    • 直接反射:光简单地切断了物体

    虽然它们对环境污染敏感,但光电接近传感器具有显着的优势:

    • Detect all types of parts(including transparent materials)
    • 其中最有效的in terms ofdetection distance: they detect objects up to 200 m away

    WHAT CAN IT BE USED FOR?

    Photoelectric sensors are used for part detection in the textile, robotics, elevator and general construction sectors. They are also found in the fields of handling and conveying as well as for applications requiring the detection of people, vehicles or animals.

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